Electrochemical behavior of Cu-mediated electrowinning-coupled CO2 capture

•Energy-efficient electrowinning-coupled CO2 capture (ECC) system was provided.•Electrochemical mechanism and kinetics of ECC process was investigated to provide valuable insights into its practical operation.•Micro-kinetics model was developed and validated by bench-scale ECC operation, which achieved energy requirements of 47.1–50.2 kJe/mol CO2.•The process modeling was an effective and efficient way to screen various experimental parameters of ECC and save experimental investment.